Patents by Inventor Dejan Sirovica

Dejan Sirovica has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5793762
    Abstract: A system and method for providing internet data and voice services to mobile subscribers is directed for use in cooperation with Internet Packet Data Network (IPDN) and an Advanced Intelligent Network (AIN) having an existing wireline switch. The system and method obviate the need for a mobile telephone switch and can include at least one mobile terminal having the functionality of a mobile host, at least one Home Location Register (HLR), a data base, a plurality of Radio Port Controllers (RPCs) in communication with at least one Radio Port (RP), an internet access node, a home agent, a Correspondent Host (CH) and a Visitor Location Register/Directory Number Manager (VLR/DN-MGR). The HLR is operative to store and provide subscription data and keep track of where at least one mobile terminal is registered in order to deliver calls thereto. The VLR/DN-MGR, together with the wireline switch, are operative to control the plurality of RPCs and coordinate the transmission of voice and data services.
    Type: Grant
    Filed: July 6, 1995
    Date of Patent: August 11, 1998
    Assignee: U S West Technologies, Inc.
    Inventors: John Henry Hubert Penners, Purushottam Vithal Kamat, Dejan Sirovica
  • Patent number: 5457736
    Abstract: A system and method adapted to provide microcellular Personal Communications Services (PCS) through the use of an improved Distributed Radio Port Controller (DRPC) architecture. The architecture achieves the desired handover with minimal impact on the existing embedded base of switches by generating new calls from target Radio Port Controllers (RPCs) through the switches to anchor RPCs and internally bridging bearer channels without the knowledge of the switches. The system includes a Home Location Register (HLR) for storing and providing subscription data and keeping track of where the mobile terminals are registered in order to deliver calls. A PCS# database is also utilized for storing a list of Universal Personal Telephone (UPT) numbers which have been assigned to the PCS subscribers. The PCS# database is operable to map these UPT numbers to the locations of their corresponding HLR.
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: October 10, 1995
    Assignee: U S WEST Technologies, Inc.
    Inventors: Michael E. Cain, Jo A. Friedman, Purushottam V. Kamat, Phillip D. Reddick, Peter L. Reinig, Dejan Sirovica